SIST EN 303-3:1999
(Main)Heating boilers - Part 3: Gas-fired central heating boilers - Assembly comprising a boiler body and a forced draught burner
Heating boilers - Part 3: Gas-fired central heating boilers - Assembly comprising a boiler body and a forced draught burner
This European Standard specifies the requirements and test methods for the construction, the safety and the rational energy usage of an assembly made up of a boiler body complying with EN 303- 11) and a forced draught gas burner complying with EN 676, using combustible gases, hereafter referred to as a "boiler". This European Standard applies to a boiler: - with a nominal output not exceeding 1 000 kW. This European Standard does not contain all the necessary requirements for: - assemblies designed as units; - condensing boilers and low temperature boilers; - boilers intended to be installed in the open; - boilers permanently fitted with more than one flue outlet; - boilers fitted with a draught diverter; - boilers intended to be connected to a common flue having mechanical extraction. This European Standard does not apply to living-space dedicated boilers If the boiler body has already been tested with a liquid fuel burner, in accordance with EN 303-1, EN 303-2 and EN 304, only the tests described in annex G need to be performed. In the case of a range of boilers, see annex F. This European Standard does not contain all the necessary requirements for low temperature boilers. Nevertheless, the testing methods defined by this European Standard for the determination of useful efficiencies can be used for low temperature boilers, after being adapted in accordance with annex H. This European Standard only covers type testing.
Heizkessel - Teil 3: Zentralheizkessel für gasförmige Brennstoffe - Zusammenbau aus Kessel und Gebläsebrenner
Diese Europäische Norm legt die Anforderungen und Prüfungen für die Sicherheit, die Gebrauchsgüte und den sparsamen Energieeinsatz von Zusammenbauten, bestehend aus einem Kesselkörper gemäß den Anforderungen von prEN 303-1 und einem Gasgebläsebrenner gemäß EN 676 - nachfolgend als Kessel bezeichnet - fest.
Chaudieres de chauffage - Partie 3: Chaudieres de chauffage central utilisant les combustibles gazeux - Assemblage d'un corps de chaudiere et d'un bruleur a air soufflé
La présente norme européenne spécifie les exigences et les méthodes d'essais relatives à la construction, la sécurité et l'utilisation rationnelle de l'énergie d'un assemblage constitué d'un corps de chaudière conforme au projet de norme prEN 303-1 et d'un brûleur à air soufflé conforme à l'EN 676 utilisant les combustibles gazeux, appelé ci-après "chaudière".
Kotli za ogrevanje - 3. del: Plinski kotli za centralno ogrevanje – Sestava kotla in ventilatorskega gorilnika
General Information
- Status
- Published
- Publication Date
- 30-Nov-1999
- Technical Committee
- PLN - Gas appliances for domestic use
- Current Stage
- 6060 - National Implementation/Publication (Adopted Project)
- Start Date
- 01-Dec-1999
- Due Date
- 01-Dec-1999
- Completion Date
- 01-Dec-1999
Relations
- Effective Date
- 01-Jun-2004
- Effective Date
- 01-Sep-2006
Overview
EN 303-3:1998 - Heating boilers - Part 3: Gas-fired central heating boilers - specifies requirements and test methods for an assembly consisting of a boiler body and a forced draught gas burner. The standard covers construction, safety and rational energy usage for boiler assemblies using combustible gases with a nominal output not exceeding 1 000 kW. EN 303-3:1998 is a type testing standard intended to support manufacturers, test laboratories and conformity assessors in demonstrating compliance.
Key topics and requirements
- Scope and applicability
- Applies to assemblies made of a boiler body (tested to relevant EN 303 parts) and a forced draught burner complying with EN 676.
- Limits: nominal outputs ≤ 1 000 kW; type testing only.
- Main technical areas covered
- Construction requirements for the boiler and burner assembly to ensure safe operation.
- Safety provisions addressing combustion system integrity and protective measures.
- Rational energy usage: test methods for determining useful efficiency and energy performance.
- Exclusions and special cases
- Not intended for: assemblies designed as integrated units, condensing or low temperature boilers (though useful-efficiency test methods can be adapted - see annex H), boilers installed outdoors, boilers with multiple permanent flue outlets, boilers fitted with draught diverters, boilers connected to a common mechanically-extracted flue, or boilers dedicated to living spaces.
- If a boiler body has been previously tested with a liquid fuel burner per EN 303-1 / EN 303-2 / EN 304, only the tests in Annex G are required. For boiler ranges see Annex F.
Applications and users
Who uses EN 303-3:1998:
- Boiler manufacturers integrating forced-draught gas burners into boiler bodies for central heating systems.
- Test laboratories and notified bodies performing type testing and efficiency measurements.
- Design and R&D engineers developing gas-fired central heating boilers to meet European safety and efficiency expectations.
- Regulatory and procurement teams specifying compliance requirements for commercial and industrial heating installations. Practical uses:
- Demonstrating safety and performance for market entry.
- Establishing test programs for product development and quality assurance.
- Comparing energy efficiency across boiler assemblies (using adapted methods for low temperature models).
Related standards
- EN 676 - forced draught gas burners (referenced for burner requirements)
- EN 303-1, EN 303-2, EN 304 - related boiler body and fuel testing standards (referenced for prior testing cases)
- Annexes F, G, H - provide guidance on ranges, reduced testing after prior liquid-fuel tests, and adapting efficiency methods for low-temperature boilers.
Keywords: EN 303-3:1998, gas-fired central heating boilers, forced draught burner, boiler assembly, type testing, EN 676, boiler safety, energy efficiency.
Frequently Asked Questions
SIST EN 303-3:1999 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Heating boilers - Part 3: Gas-fired central heating boilers - Assembly comprising a boiler body and a forced draught burner". This standard covers: This European Standard specifies the requirements and test methods for the construction, the safety and the rational energy usage of an assembly made up of a boiler body complying with EN 303- 11) and a forced draught gas burner complying with EN 676, using combustible gases, hereafter referred to as a "boiler". This European Standard applies to a boiler: - with a nominal output not exceeding 1 000 kW. This European Standard does not contain all the necessary requirements for: - assemblies designed as units; - condensing boilers and low temperature boilers; - boilers intended to be installed in the open; - boilers permanently fitted with more than one flue outlet; - boilers fitted with a draught diverter; - boilers intended to be connected to a common flue having mechanical extraction. This European Standard does not apply to living-space dedicated boilers If the boiler body has already been tested with a liquid fuel burner, in accordance with EN 303-1, EN 303-2 and EN 304, only the tests described in annex G need to be performed. In the case of a range of boilers, see annex F. This European Standard does not contain all the necessary requirements for low temperature boilers. Nevertheless, the testing methods defined by this European Standard for the determination of useful efficiencies can be used for low temperature boilers, after being adapted in accordance with annex H. This European Standard only covers type testing.
This European Standard specifies the requirements and test methods for the construction, the safety and the rational energy usage of an assembly made up of a boiler body complying with EN 303- 11) and a forced draught gas burner complying with EN 676, using combustible gases, hereafter referred to as a "boiler". This European Standard applies to a boiler: - with a nominal output not exceeding 1 000 kW. This European Standard does not contain all the necessary requirements for: - assemblies designed as units; - condensing boilers and low temperature boilers; - boilers intended to be installed in the open; - boilers permanently fitted with more than one flue outlet; - boilers fitted with a draught diverter; - boilers intended to be connected to a common flue having mechanical extraction. This European Standard does not apply to living-space dedicated boilers If the boiler body has already been tested with a liquid fuel burner, in accordance with EN 303-1, EN 303-2 and EN 304, only the tests described in annex G need to be performed. In the case of a range of boilers, see annex F. This European Standard does not contain all the necessary requirements for low temperature boilers. Nevertheless, the testing methods defined by this European Standard for the determination of useful efficiencies can be used for low temperature boilers, after being adapted in accordance with annex H. This European Standard only covers type testing.
SIST EN 303-3:1999 is classified under the following ICS (International Classification for Standards) categories: 91.140.10 - Central heating systems; 97.100.20 - Gas heaters. The ICS classification helps identify the subject area and facilitates finding related standards.
SIST EN 303-3:1999 has the following relationships with other standards: It is inter standard links to SIST EN 303-3:1999/A2:2004, SIST EN 303-3:1999/AC:2006. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
SIST EN 303-3:1999 is associated with the following European legislation: EU Directives/Regulations: 2009/142/EC, 2016/426, 90/396/EEC, 92/42/EEC; Standardization Mandates: M/066, M/BC/CEN/89/6. When a standard is cited in the Official Journal of the European Union, products manufactured in conformity with it benefit from a presumption of conformity with the essential requirements of the corresponding EU directive or regulation.
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Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Kotli za ogrevanje - 3. del: Plinski kotli za centralno ogrevanje – Sestava kotla in ventilatorskega gorilnikaHeizkessel - Teil 3: Zentralheizkessel für gasförmige Brennstoffe - Zusammenbau aus Kessel und GebläsebrennerChaudieres de chauffage - Partie 3: Chaudieres de chauffage central utilisant les combustibles gazeux - Assemblage d'un corps de chaudiere et d'un bruleur a air souffléHeating boilers - Part 3: Gas-fired central heating boilers - Assembly comprising a boiler body and a forced draught burner97.100.20Plinski grelnikiGas heaters91.140.10Sistemi centralnega ogrevanjaCentral heating systemsICS:Ta slovenski standard je istoveten z:EN 303-3:1998SIST EN 303-3:1999en01-december-1999SIST EN 303-3:1999SLOVENSKI
STANDARD
SIST EN 303-3:1
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